You must grease them during install, and then upon every oil change, per TMS.

Install was easy, I had to use emery cloth on the DS Control arms due so a tacky adhesive where the bushing was mounted, as well as clean up the threads on the DS as well, but they’re a lot easier to install than rubber. If you were installing new control arms at the time, the install could’ve been even easier because popping out the inner ball joint would prevent any binding while lining lollipop up with the chassis.